Methods: Operasi Aritmatika

class Main {
    
    public static void main(String[] args) {
        Main main = new Main();
        
        System.out.println("Hasil penjumlahan: "+ main.calculate("add", 10, 3)); // tambah
        System.out.println("Hasil pengurangan: "+ main.calculate("sub", 10, 3)); // kurang
        System.out.println("Hasil perkalian  : "+ main.calculate("mul", 10, 3)); // kali
        System.out.println("Hasil pembagian  : "+ main.calculate("div", 10, 0)); // bagi
    }
    
    public int calculate(String type, int a, int b) {
        if(type.equalsIgnoreCase("add")) {      // tambah
            return a + b;       
        }
        else if(type.equalsIgnoreCase("sub")) { // kurang
            return a - b;       
        }
        else if(type.equalsIgnoreCase("mul")) { // kali
            return a * b;       
        }
        else if(type.equalsIgnoreCase("div")) { // bagi
            if(b != 0) {
                return a / b;   
            }
        }
        return 0;
    }
}